Soche Explained

Soche is a 3955adj=midNaNadj=mid dacitic volcano in Ecuador and is located on the northern end of a secondary volcanic chain. Constructed on a Paleozoic substratum, it contains an eastwards-opening caldera in the summit region. A large eruption in 6650 BCE generated ashfall into Colombia and two lava domes in the caldera.^[1] The ash- and lapilli-fall is about a metre thick in the Interandean valley and the neighbouring cordilleras and most likely represented a long-lasting obstacle for human population.^[2] Earlier eruptive events involving a lava flow that was subsequently offset by a fault zone named the Cayambe-Chingual fault by 110m occurred 9.67 ka BP,^[3] and another involving a pyroclastic flow was dated at 37.22 ± 0.63 ka BP.^[4]

References

0.552°N -77.58°W

Notes and References

1. 352001. Soche. 29 July 2015.
2. Hall. Minard L.. Mothes. Patricia A.. Volcanic impediments in the progressive development of pre-Columbian civilizations in the Ecuadorian Andes. Journal of Volcanology and Geothermal Research. 176. 3. 2008. 344–355. 0377-0273. 10.1016/j.jvolgeores.2008.01.039.
3. Tibaldi. A.. Rovida. A.. Corazzato. C.. Late Quaternary kinematics, slip-rate and segmentation of a major Cordillera-parallel transcurrent fault: The Cayambe-Afiladores-Sibundoy system, NW South America. Journal of Structural Geology. 29. 4. 2007. 664–680. 0191-8141. 10.1016/j.jsg.2006.11.008.
4. Egbue. Obi. Kellogg. James. Pleistocene to Present North Andean "escape". Tectonophysics. 489. 1-4. 2010. 248–257. 0040-1951. 10.1016/j.tecto.2010.04.021.